Alternative Names

How the Test is Performed

Needle aspiration is the most common method of taking an abdominal wall fat pad biopsy.

The health care provider cleans the skin on your belly area. Numbing medicine may be applied on the area. A needle is placed through the skin and into the fat pad under the skin. A small piece of the fat pad is removed with the needle. It is sent to a laboratory for analysis.

How to Prepare for the Test

No special preparation is usually necessary. However, follow any specific instructions your provider gives you.

How the Test will Feel

You may have some mild discomfort or feel pressure when the needle is inserted. Afterward, the area may feel tender or be bruised for several days.

Why the Test is Performed

The procedure is done most often to test for amyloidosis. Amyloidosis is a disorder in which abnormal proteins build up in tissues and organs, impairing their function. Clumps of the abnormal proteins are called amyloid deposits.

Diagnosing the disease in this way may avoid the need for a biopsy of a nerve or an internal organ, which is a more difficult procedure.

Normal Results

The fat pad tissues are normal.

What Abnormal Results Mean

In the case of amyloidosis, abnormal results mean there are amyloid deposits.

Information developed by A.D.A.M., Inc. regarding tests and test results may not directly correspond with information provided by UCSF Health. Please discuss with your doctor any questions or concerns you may have.

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